<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>LOVE</title>
 
<style>
body{
  overflow: hidden;
  margin: 0;
}
h1{
  position: fixed;
  top: 40%;
  left: 0;
  width: 100%;
  text-align: center;
  transform:translateY(-50%);
  font-family: 'Love Ya Like A Sister', cursive;
  font-size: 30px;
  color: #808080;
  padding: 0 20px;
}
 
@media (min-width:1200px){
  h1{
    font-size: 35px;
  }
}
</style>
<script>
		function chk()
		{
			if(sessionStorage.getItem("username"))
			{
				// alert(sessionStorage.getItem("username").toString()+"happy brithday!");
			}
			else{
				alert("请先输入密语(⊙o⊙)!");
				window.location.href="reg.html";
			}
		}
	</script>
 
</head>
<body onload="chk()">
 
<canvas></canvas>
<h1 onclick="bili()">孙超 20 岁 happy brithday!~
click me~</h1>
<audio autoplay="autoplay" loop="loop" preload="auto" src="happy.mp3"></audio>
<script>
var canvas = document.querySelector("canvas"),
  ctx = canvas.getContext("2d");
 
var ww,wh;
 
function onResize(){
  ww = canvas.width = window.innerWidth;
  wh = canvas.height = window.innerHeight;
}
 
ctx.strokeStyle = "red";
ctx.shadowBlur = 25;
ctx.shadowColor = "hsla(0, 100%, 60%,0.5)";
 
var precision = 100;
var hearts = [];
var mouseMoved = false;
function onMove(e){
  mouseMoved = true;
  if(e.type === "touchmove"){
    hearts.push(new Heart(e.touches[0].clientX, e.touches[0].clientY));
    hearts.push(new Heart(e.touches[0].clientX, e.touches[0].clientY));
  }
  else{
    hearts.push(new Heart(e.clientX, e.clientY));
    hearts.push(new Heart(e.clientX, e.clientY));
  }
}
 
var Heart = function(x,y){
  this.x = x || Math.random()*ww;
  this.y = y || Math.random()*wh;
  this.size = Math.random()*2 + 1;
  this.shadowBlur = Math.random() * 10;
  this.speedX = (Math.random()+0.2-0.6) * 8;
  this.speedY = (Math.random()+0.2-0.6) * 8;
  this.speedSize = Math.random()*0.05 + 0.01;
  this.opacity = 1;
  this.vertices = [];
  for (var i = 0; i < precision; i++) {
    var step = (i / precision - 0.5) * (Math.PI * 2);
    var vector = {
      x : (15 * Math.pow(Math.sin(step), 3)),
      y : -(13 * Math.cos(step) - 5 * Math.cos(2 * step) - 2 * Math.cos(3 * step) - Math.cos(4 * step)) 
    }
    this.vertices.push(vector);
  }
}
 
Heart.prototype.draw = function(){
  this.size -= this.speedSize;
  this.x += this.speedX;
  this.y += this.speedY;
  ctx.save();
  ctx.translate(-1000,this.y);
  ctx.scale(this.size, this.size);
  ctx.beginPath();
  for (var i = 0; i < precision; i++) {
    var vector = this.vertices[i];
    ctx.lineTo(vector.x, vector.y);
  }
  ctx.globalAlpha = this.size;
  ctx.shadowBlur = Math.round((3 - this.size) * 10);
  ctx.shadowColor = "hsla(0, 100%, 60%,0.5)";
  ctx.shadowOffsetX = this.x + 1000;
  ctx.globalCompositeOperation = "screen"
  ctx.closePath();
  ctx.fill()
  ctx.restore();
};
 
 
function render(a){
  requestAnimationFrame(render);
  
  hearts.push(new Heart())
  ctx.clearRect(0,0,ww,wh);
  for (var i = 0; i < hearts.length; i++) {
    hearts[i].draw();
    if(hearts[i].size <= 0){
      hearts.splice(i,1);
      i--;
    }
  }
}
 
 
onResize();
window.addEventListener("mousemove", onMove);
window.addEventListener("touchmove", onMove);
window.addEventListener("resize", onResize);
requestAnimationFrame(render);
function bili()
{
	{window.location.href="index.html";}
}
</script>

</body>
</html>
 